How do you measure and report Service uptime?

December 21, 2011

Firstly, Uptime can be defined as the time a service/machine has been efficiently rendering service/reliable and stable, without any interruptions or break in service.

Uptime of a service also depends on the availability of that service, because, only when the service is available, it can be used efficiently.

Uptime can be calculated as a difference between availability and downtime of a service.

Uptime = Availability- Downtime


“Availability” = A measure in time where a service is capable of being used.

“Downtime” = When the service is available but gives unreliable service or is not optimal/ has interruptions.

The uptime of a service can also be measured based on customer response and ratings.

StoneFly’s resources/casestudies  provides interesting information about service uptime.

Follow the link provided below:


What is this FCoE buzzword that I keep hearing? Do I need it?

December 16, 2011

FCOE- Fiber Channel over Ethernet is a mapping of Fiber Channel frames over Ethernet networks. Several datacenters use Ethernet for TCP/IP networks, and FC for SANs. FCoE uses the fiber channel as a network protocol, running on Ethernet beside IP traffic. FCoE is not routable at the IP layer, since it functions directly above Ethernet, in contrast to iSCSI, running on top of TCP/IP.

Users connect to FCoE using Converged Network Adapters (CNAs). FCoE is used in data center SANs as it can reduce cabling, it can also be used in server virtualization applications.

Do I need it? – when buying a new SAN,  iSCSI SAN offers a SAN over Ethernet along with all the features that FC SAN provided, making FCoE less compelling to buy. The only reason to choose FCoE over iSCSI SAN is when you already have installed a fiber channel SAN and you want to use this SAN, but along with same Ethernet infrastructure for both SAN and networking. Although this would be a good reason to get FCoE, the costs involved in new switches and infrastructure would keep you from choosing FCoE over iSCSI SAN.

For more information on FCoE versus iSCSI, visit StoneFly’s videos on FCoE vs iSCSI,

link provided below:


What SSDs Can Do For Your Storage

December 16, 2011

Solid State Disks (SSD) use non-volatile flash memory for data storage, providing several benefits over traditional Hard Disk Drive (HDD) technology:

Improved Performance: The most noticeable benefit of SSD technology is improved I/O speed. SSDs boast random I/O rates up to 100 times faster than the best HDDs, and the lack of seek time reduces latency and further boosts I/OPS.

Superior Reliability: SSDs store data on nonvolatile microchips. The lack of moving parts makes them far less susceptible to mechanical failures. In addition, they offer greater protection against extreme shock, vibration than HDDs have lower access time and latency.

Low Power Consumption: SSDs use NAND based flash memory which saves memory even without power. They consume power only while reading or writing data which explains the less power consumption, also producing less heat and noise. SSD uses fewer drives to meet same operational performance, majorly reducing high cooling as well as electricity costs.

Data Protection: SSD firmware includes advanced data management functions, including over-provisioning, error detection code and error correction algorithms. Built-in dynamic and static wear-leveling and bad block mapping algorithms extend service life and prevent disk corruption.

For more information on SSD Storage, visit StoneFly’s

Speed up your Storage with Solid State Drives

September 21, 2011

Arguably the most important data storage innovation in decades, the Solid State Drive (SSD) continues to revolutionize enterprise storage.  SSDs speed and reliability make them the preferred solution for I/O intensive applications. Now, solid-state storage is getting even faster with PCIe SSDs. These card-based devices exploit the incredible bandwidth advantage of the PCIe interface to eliminate HBA bottlenecks and provide high bandwidth, low latency access to storage resources. At StoneFly, we are testing PCIe SSDs in our new StoneFlex Unified Storage & Server (USS™) Appliance.

Click here for more info about USS™ and read how StoneFly is using the latest technologies to enhance SAN performance.

Two Myths about RAID – Busted

June 29, 2011

As everybody knows that when it comes to RAID, there are certain configuration myths that everybody seems to know:

1. RAID 10 is a requirement for databases. This is no longer the case. Today’s RAID controllers are much more dynamic that it once was as a combination of 400GHz and higher ASICS and IO processors as well as better algorithms have lessened the advantages of RAID 10.

2. RAID 1 configuration is perfect for holding the operating system. Actually this is false – small partition of the OS or applications from a RAID 5/6 is more than adequate. However, with the movement towards centralized storage, shared by high server counts, there is a justification to hold the operating system in the server and protect it with a mirror only because it is not practical to build multi-spindle performance effective RAID5/6 sets in 1U servers or blades.

Learn more about RAID and how to optimize RAID configuration on this white paper.

Also check out our RAID calculator.

Virtualization and Cloud Computing – Who’s winning the battle?

June 16, 2011

It all started in the data centers and then quickly spread to consumer-based services as a means to easily store your data. From running business-critical applications to safeguarding your complete collection of Beatles songs, we see  the “cloud” coming over the horizon, revolutionizing the way we house our information. But with all this talk about the cloud, don’t forget that virtualization is still a widely adopted solution in the data center arena and has been over the past few years.

According to the 2011 Virtualization and Evolution to the Cloud Survey, 75% of large enterprises that participated in the survey are considering both server virtualization and hybrid cloud computing platforms. Interestingly enough due to virtualization’s maturity in the IT space, enterprises that have implemented virtualization have been vastly satisfied with their infrastructure – only a 4% gap between the expectations and achievements.

Learn more about Virtualization and Cloud Computing technology on the links below:

  • Learn more about our Cloud and Virtualization appliances on our products page

What is the latest on Disaster Recovery and what really works?

September 24, 2010

Disaster Recovery and Business Continuity Planning is essential in small, medium or enterprise sized business. Why is that? For one thing, safeguarding your data in the event of disaster can save you time, money, and not to mention your sanity.

Please join us on Wednesday, September 29, 2010 at 10am Pacific/ 1pm Eastern and learn the essentials of effective Disaster Recovery and Business Continuity Planning.

Register here for more details: